The Greens at the 2004 Queensland State election almost trebled their primary vote from 2001, an increase suggesting the party has already filled the vacuum left by the declining Australian Democrats as the State's principal Left of- Centre minor party. This article argues, first, that much of this growth in support can be attributed to the substantial interstate migration to the State's southeast, a pattern that has contributed to a partial transformation of Queensland's traditional political culture to one more disposed to Green support. Second, given that this growth is set to continue, it is argued that the Queensland Greens are yet to maximise their vote. This article analyses the 2004 Queensland State election results to determine the impact of Green preferences under the State's Optional Preferential Voting (OPV) system, and to locate where geographically, and among whom demographically, Green support was strongest. A rudimentary profile of the 'typical' Queensland Greens voter is also offered.